Three new cases of suspected coronavirus were revealed by French football giants Marseille on Sunday, just five days before they kick-off the new Ligue 1 season. The cases are amongst the "workforce" a statement said, and if confirmed would take the number at the club to four in the last four days. Andre Villas-Boas' side already cancelled a friendly on Friday against Stuttgart of Germany as a precaution. Under health protocols adopted in recent weeks which are awaiting final approval, the four cases could mean Marseille's scheduled opener against St Etienne on Friday may be called off. At least 37 Ligue 1 players from 11 clubs have tested positive for COVID-19 in recent weeks. The vast majority of them contracted the virus after resuming training in June, leading to quarantine and a flurry of cancelled pre-season matches. mg-jp-ama/dj/iwd